import pymysql
from pyecharts.charts import Pie
from pyecharts import options
# 连接数据库
db = pymysql.connect(
    host="localhost",
    user="root",
    password="",
    database="crawlerdemo",
    charset="utf8"
)
cursor = db.cursor()
#用来查找岗位数量最多的五个城市
sql="select job_place,count(job_id) from job group by job_place order by count(job_id) desc limit 5"
try:
    cursor.execute(sql)
    res = cursor.fetchall()
    pie = Pie()
    #[("类型1",30)("类型2",4日),......
    pie.add("单位/个",res)
    pie.set_global_opts(title_opts=options.TitleOpts(title="岗位数量最多的五个城市"))
    pie.render("pienum.html")
except:
    print("查询出错啦")